Try the beta versions on CPAN (1.54_something) which you have to download and install manually, or alternatively downgrade to 1.52, which is what I still use as it's very stable.
I'm a bit biased (I'm the author of XML::LibXSLT and original author of XML::LibXML though it's been taken over by someone else now), but I would say XML::LibXML+LibXSLT is the only serious option for doing XSLT work in perl right now (unless you're on windows, and then possibly calling MSXML via Win32::OLE is a good alternative). It's *extremely* fast and I think barring very strange corners of the relevant specifications it's 100% compliant to the specs.
Hope that helps. As vek suggested - if it doesn't then often the perl-xml list is a better place to ask.